Method and system for controlling radio controlled devices

Abstract

The present invention is a method and system for controlling a RC device via a secure radio link. In one embodiment of the invention, spread spectrum modulation may be employed which may provide a digital radio frequency (RF) link between a controller and a RC device. A controller may be coupled with a transmitter module and a radio controlled device may be coupled with a receiver module in accordance with the present invention to provide an add-on upgrade capability. The method and system for controlling a RC device may also include error detection and correction, interpolation of lost packets, failsafe technology and force-feedback telemetric technology to further enhance the user experience with radio controlled devices.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present application claims the benefit of U.S. Provisional Application Ser. No. 60 / 667,286 filed Apr. 1, 2005. Said U.S. Provisional Application Ser. No. 60 / 667,286 filed Apr. 1, 2005 is hereby incorporated by reference in its entirety.FIELD OF THE INVENTION[0002]The present invention generally relates to radio controlled (RC) devices and more particularly to a system and method for controlling radio controlled devices.BACKGROUND OF THE INVENTION[0003]Radio controlled (RC) devices, including radio controlled model vehicles, such as cars, boats, helicopters and planes are enjoyed by hobbyists recreationally and competitively. Referring to FIG. 1, a radio controlled system 100 known to the art is shown. Conventional radio controlled system 100 may include a radio controlled device 110 and a hand-held controller 120. The radio controlled device 110, such as a car, is typically controlled by a user through the use of a hand-held controlle...

AI Technical Summary

Benefits of technology

[0010]Accordingly, the present invention is a method and system for controlling a RC device via a secure radio link. In one embodiment of the invention, spread spectrum modulation may be employed which may provide a digital radio frequency (RF) link between a controller and a RC device. A controller may be coupled with a transmitter module and a radio controlled device may be coupled with a receiver module in accordance with the present invention to provide an add-on upgrade capability. The method and system for controlling a RC device may also include error detection and correction, interpolation of lost packets, failsafe technology and force-feedback telemetric technology to further enhance the user experience with radio controlled devices.

Problems solved by technology

A common problem associated with conventional RC devices is the disruption in the radio signal between a hand-held controller and the receiver of the radio controlled device.

For instance, conventional radio controlled devices may have a limited range of operation.

Additionally, radio signals may be disrupted due to interference caused by noisy motors, speed controllers, garage door openers, wireless communication devices and the like.

Another source of interference is produced by other radio signals for other radio controlled devices.

Two devices operating next to each other on the same frequency may cause loss of control and may cause a collision of the devices.

However, crystals are costly for RC device operators, and frequency monitoring is an additional undesirable limitation.

Additionally, frequencies must be assigned to operators before operation of an RC device, causing a delay before operation may begin.

This may significantly reduce practice time for professional RC device operators and negatively impact the enjoyment of hobbyists.

With respect to radio controlled aircraft devices, another disadvantage of conventional transmission methods is multipath fading.

However, signals that are received out of phase may produce a weak or fading signal.

Further, the receiver will be subject to varying levels of signal reception as it moves around, caused by constructive and destructive addition of the impinging waves due to their different phase offsets.

Conventional RC aircraft device systems are subject to fading signal loss, potentially causing damage or destruction of the aircraft device.

Radio controlled aircraft devices may also be subject to intersymbol interference (ISI).

Because of the dispersion, symbols may collide and result in distorted output data.

A receiver may not be capable of reliably distinguishing between individual elements and, at a certain threshold, ISI may compromise the integrity of received data.

Because conventional RC aircraft devices cannot resolve multipath fading, they are unable to prevent intersymbol interference, resulting in transmitted data that may be substantially compromised upon arrival at a receiver.

Conventional radio controlled aircraft devices are also unable to prevent an aircraft device from operating according to an incorrect model program.

A radio controlled device operator may be unable to determine the model program corresponding to his radio controlled device.

While an aircraft device may function properly when operated under an incorrect model program under certain circumstances, an aircraft device operator may be more likely to lose control of the radio controlled device.

A radio controlled aircraft device may be damaged or destroyed if an operator is unable to control the device, resulting in costly repairs or replacement of the device.

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